Journal
COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY B-BIOCHEMISTRY & MOLECULAR BIOLOGY
Volume 219, Issue -, Pages 10-16Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.cbpb.2018.03.001
Keywords
Drugstore beetle; Chitin deacetylase 1; Expression pattern; RNA interference
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Funding
- National Natural Science Foundation of China [31460476, 31501649]
- Science and Technology Foundation of Guizhou Province [QKHLH[2014]7167, QKHJZ[2014]2002]
- Doctor Foundation Project of Guiyang University [XRC2014003]
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Chitin deacetylases (CDAs) are chitin degradation enzymes that strictly regulate growth and development in insects. In this study, we identified and characterized a full-length cDNA of the CDA gene (SpCDA1) in the drugstore beetle, Stegoblwn paniceum. The open reading frame of SpCDA1 (1614 bp) encoded a 537 amino acid protein, which possessed typical domain structures of CDAs. Phylogenetic comparison to other insect CDAs revealed that SpCDA1 belongs to Group Ib CDAs. Quantitative real-time PCR analyses showed that SpCDA1 was highly expressed in late larval stages. Significant increase of SpCDA1 transcript level in the larvae was observed upon the exposure of 20-hydroxyecdysone. Injection of double-stranded RNA (dsRNA) of SpCDA1 into the late larvae significantly reduced SpCDA1 transcript levels, resulted in larval-pupal molting difficulty and produced high larval mortality. After 15 days, the survival rate of S. pantceum in dsSpCDA1 group was significantly reduced by 72% compared to the control. The results demonstrated that SpCDA1 is essential for successful larval-pupal transition in S. paniceum and this gene may be a potential target for pest control.
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